What they did
The poster, ambewas on Hacker News, is an app developer who moved into game development and got tired of image generators for art: every edit meant rolling the dice again. So they built Klad, a Rust painting and animation app where every brush, layer, fill and timeline function is also a command line call. A coding agent reads the drawing as JSON, paints with the same brushes a person uses and its strokes show up in the open editor about a second later. Their setup is to point the agent at the repo, let it build the app and load the bundled drawing skills, then ask in plain words for the art a game needs. They use it daily on a Mac, mostly with Claude Fable 5.2.
How it went
Asked for a little sprout creature for a game, the agent laid down 4,344 strokes and fills. The poster then recoloured the leaves, bent the mouth and moved a smudge by hand, without redrawing anything. The agent grouped the creature's parts into five groups and animated a walk with 205 keys, with no frame repainted. It also painted a night scene and a kit of twelve game props. The poster calls the results quite impressive but says quality depends heavily on the agent used. Pen pressure on Linux still needs work and Windows is untested by them.
Worth knowing
This is the maker's own launch post, so it is one enthusiastic account. The app is source-available, not open source: free for individuals and small companies, with paid binaries planned. You build it yourself for now. The post names only the model, Claude Fable 5.2, not the harness, though the app expects any agent that can run shell commands. Each stroke stays editable data, so drawings sit well in git.